【摘要】 利用MoldFlow软件对聚甲基丙烯酸甲酯（PMMA）材料的微结构塑件进行注射成型的充模流动模拟分析，得到模具型腔的压力分布，将MoldFlow所获得的数据导入Abaqus软件，对超声辅助注射成型中的超声振子变幅杆端面不同高宽比的微凸起结构进行强度分析。数值计算结果表明，当超声振子端面微凸起的尺寸由高100μm、宽80μm改为高80μm、宽100μm时，最大位移由0.4864μm减少到0.03976μm，为实际超声振子变幅杆端面微凸起结构的尺寸设计提供可靠指导。更多还原

【Abstract】 MoldFlow software was used to simulate the injection molding flow of polymethyl methacrylate(PMMA) microstructure plastic parts,and the data about pressure distribution in the mold cavity were obtained. The data obtained by MoldFlow software were imported into Abaqus software to analyze strength of the micro-bulge structure with different height-width ratios in the end face of the vibrator horn for ultrasonic-assisted injection molding.The nμmerical results show that the maximal displacement t decreased from 0.4864μm to 0.03976μm when the size of the micro-bulge in the end face of the ultrasonic vibrator is changed from 100μm high and80μm wide to 100μm high and 80μm wide, which provides a reliable guide for design of the actual sizes of the micro-bulge structure in the end face of the ultrasonic vibrator horn.更多还原